¿Qué clases de animales existen en este planeta?
Translates to:
What kinds of animals exist on this planet?
The options vary based on the conjugation of the infinitive existir. They are:
· existimos - "[we] exist"
· existes - "[you] exist" (informal you)
· existe - "[he/she/you/there] exists" (formal you)
· existo - "[I] exist"
The only conjugation that makes sense here is existe.
Answer:
En este planeta existe toda clase de animales.
"All kinds of animals exist on this planet."